Disabling And Enabling Short Radio Preambles - Cisco 1941W Configuration Manual
Cisco 3900 series, cisco 2900 series,
cisco 1900 series
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Also See for 1941W:
- Hardware installation manual (102 pages) ,
- Installing and upgrading (24 pages)
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Chapter
Configuring Radio Settings
Disabling and Enabling Short Radio Preambles
The radio preamble (sometimes called a header) is a section of data at the head of a packet that contains
information that the wireless device and client devices need when sending and receiving packets. You
can set the radio preamble to long or short:
•
•
You cannot configure short or long radio preambles on the 5-GHz radio.
To disable short radio preambles, follow these steps, beginning in privileged EXEC mode:
SUMMARY STEPS
1.
2.
3.
4.
5.
DETAILED STEPS
Command
Step 1
configure terminal
Step 2
interface dot11radio {0| 1}
Step 3
no preamble-short
Step 4
end
Step 5
copy running-config startup-config (Optional) Saves your entries in the configuration file.
Short preambles are enabled by default. Use the preamble-short command to enable short preambles if
they are disabled.
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Short—A short preamble improves throughput performance.
Long—A long preamble ensures compatibility between the wireless device and all early models of
Cisco Aironet Wireless LAN Adapters. If these client devices do not associate to the wireless
devices, you should use short preambles.
configure terminal
interface dot11radio {0| 1}
no preamble-short
end
copy running-config startup-config
Disabling and Enabling Short Radio Preambles
Purpose
Enters global configuration mode.
Enters interface configuration mode for the 2.4-GHz radio
interface.
Disables short preambles and enable long preambles.
Returns to privileged EXEC mode.
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